2 * Rockchip AXI PCIe host controller driver
4 * Copyright (c) 2016 Rockchip, Inc.
6 * Author: Shawn Lin <shawn.lin@rock-chips.com>
7 * Wenrui Li <wenrui.li@rock-chips.com>
9 * Bits taken from Synopsys Designware Host controller driver and
10 * ARM PCI Host generic driver.
12 * This program is free software: you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation, either version 2 of the License, or
15 * (at your option) any later version.
18 #include <linux/clk.h>
19 #include <linux/delay.h>
20 #include <linux/gpio/consumer.h>
21 #include <linux/init.h>
22 #include <linux/interrupt.h>
23 #include <linux/iopoll.h>
24 #include <linux/irq.h>
25 #include <linux/irqchip/chained_irq.h>
26 #include <linux/irqdomain.h>
27 #include <linux/kernel.h>
28 #include <linux/mfd/syscon.h>
29 #include <linux/of_address.h>
30 #include <linux/of_device.h>
31 #include <linux/of_pci.h>
32 #include <linux/of_platform.h>
33 #include <linux/of_irq.h>
34 #include <linux/pci.h>
35 #include <linux/pci_ids.h>
36 #include <linux/phy/phy.h>
37 #include <linux/platform_device.h>
38 #include <linux/reset.h>
39 #include <linux/regmap.h>
42 * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16
43 * bits. This allows atomic updates of the register without locking.
45 #define HIWORD_UPDATE(mask, val) (((mask) << 16) | (val))
46 #define HIWORD_UPDATE_BIT(val) HIWORD_UPDATE(val, val)
48 #define ENCODE_LANES(x) ((((x) >> 1) & 3) << 4)
50 #define PCIE_CLIENT_BASE 0x0
51 #define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
52 #define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001)
53 #define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002)
54 #define PCIE_CLIENT_ARI_ENABLE HIWORD_UPDATE_BIT(0x0008)
55 #define PCIE_CLIENT_CONF_LANE_NUM(x) HIWORD_UPDATE(0x0030, ENCODE_LANES(x))
56 #define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040)
57 #define PCIE_CLIENT_GEN_SEL_1 HIWORD_UPDATE(0x0080, 0)
58 #define PCIE_CLIENT_GEN_SEL_2 HIWORD_UPDATE_BIT(0x0080)
59 #define PCIE_CLIENT_DEBUG_OUT_0 (PCIE_CLIENT_BASE + 0x3c)
60 #define PCIE_CLIENT_DEBUG_LTSSM_MASK GENMASK(5, 0)
61 #define PCIE_CLIENT_DEBUG_LTSSM_L1 0x18
62 #define PCIE_CLIENT_DEBUG_LTSSM_L2 0x19
63 #define PCIE_CLIENT_BASIC_STATUS1 (PCIE_CLIENT_BASE + 0x48)
64 #define PCIE_CLIENT_LINK_STATUS_UP 0x00300000
65 #define PCIE_CLIENT_LINK_STATUS_MASK 0x00300000
66 #define PCIE_CLIENT_INT_MASK (PCIE_CLIENT_BASE + 0x4c)
67 #define PCIE_CLIENT_INT_STATUS (PCIE_CLIENT_BASE + 0x50)
68 #define PCIE_CLIENT_INTR_MASK GENMASK(8, 5)
69 #define PCIE_CLIENT_INTR_SHIFT 5
70 #define PCIE_CLIENT_INT_LEGACY_DONE BIT(15)
71 #define PCIE_CLIENT_INT_MSG BIT(14)
72 #define PCIE_CLIENT_INT_HOT_RST BIT(13)
73 #define PCIE_CLIENT_INT_DPA BIT(12)
74 #define PCIE_CLIENT_INT_FATAL_ERR BIT(11)
75 #define PCIE_CLIENT_INT_NFATAL_ERR BIT(10)
76 #define PCIE_CLIENT_INT_CORR_ERR BIT(9)
77 #define PCIE_CLIENT_INT_INTD BIT(8)
78 #define PCIE_CLIENT_INT_INTC BIT(7)
79 #define PCIE_CLIENT_INT_INTB BIT(6)
80 #define PCIE_CLIENT_INT_INTA BIT(5)
81 #define PCIE_CLIENT_INT_LOCAL BIT(4)
82 #define PCIE_CLIENT_INT_UDMA BIT(3)
83 #define PCIE_CLIENT_INT_PHY BIT(2)
84 #define PCIE_CLIENT_INT_HOT_PLUG BIT(1)
85 #define PCIE_CLIENT_INT_PWR_STCG BIT(0)
87 #define PCIE_CLIENT_INT_LEGACY \
88 (PCIE_CLIENT_INT_INTA | PCIE_CLIENT_INT_INTB | \
89 PCIE_CLIENT_INT_INTC | PCIE_CLIENT_INT_INTD)
91 #define PCIE_CLIENT_INT_CLI \
92 (PCIE_CLIENT_INT_CORR_ERR | PCIE_CLIENT_INT_NFATAL_ERR | \
93 PCIE_CLIENT_INT_FATAL_ERR | PCIE_CLIENT_INT_DPA | \
94 PCIE_CLIENT_INT_HOT_RST | PCIE_CLIENT_INT_MSG | \
95 PCIE_CLIENT_INT_LEGACY_DONE | PCIE_CLIENT_INT_LEGACY | \
98 #define PCIE_CORE_CTRL_MGMT_BASE 0x900000
99 #define PCIE_CORE_CTRL (PCIE_CORE_CTRL_MGMT_BASE + 0x000)
100 #define PCIE_CORE_PL_CONF_SPEED_5G 0x00000008
101 #define PCIE_CORE_PL_CONF_SPEED_MASK 0x00000018
102 #define PCIE_CORE_PL_CONF_LANE_MASK 0x00000006
103 #define PCIE_CORE_PL_CONF_LANE_SHIFT 1
104 #define PCIE_CORE_CTRL_PLC1 (PCIE_CORE_CTRL_MGMT_BASE + 0x004)
105 #define PCIE_CORE_CTRL_PLC1_FTS_MASK GENMASK(23, 8)
106 #define PCIE_CORE_CTRL_PLC1_FTS_SHIFT 8
107 #define PCIE_CORE_CTRL_PLC1_FTS_CNT 0xffff
108 #define PCIE_CORE_TXCREDIT_CFG1 (PCIE_CORE_CTRL_MGMT_BASE + 0x020)
109 #define PCIE_CORE_TXCREDIT_CFG1_MUI_MASK 0xFFFF0000
110 #define PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT 16
111 #define PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(x) \
112 (((x) >> 3) << PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT)
113 #define PCIE_CORE_INT_STATUS (PCIE_CORE_CTRL_MGMT_BASE + 0x20c)
114 #define PCIE_CORE_INT_PRFPE BIT(0)
115 #define PCIE_CORE_INT_CRFPE BIT(1)
116 #define PCIE_CORE_INT_RRPE BIT(2)
117 #define PCIE_CORE_INT_PRFO BIT(3)
118 #define PCIE_CORE_INT_CRFO BIT(4)
119 #define PCIE_CORE_INT_RT BIT(5)
120 #define PCIE_CORE_INT_RTR BIT(6)
121 #define PCIE_CORE_INT_PE BIT(7)
122 #define PCIE_CORE_INT_MTR BIT(8)
123 #define PCIE_CORE_INT_UCR BIT(9)
124 #define PCIE_CORE_INT_FCE BIT(10)
125 #define PCIE_CORE_INT_CT BIT(11)
126 #define PCIE_CORE_INT_UTC BIT(18)
127 #define PCIE_CORE_INT_MMVC BIT(19)
128 #define PCIE_CORE_INT_MASK (PCIE_CORE_CTRL_MGMT_BASE + 0x210)
129 #define PCIE_RC_BAR_CONF (PCIE_CORE_CTRL_MGMT_BASE + 0x300)
131 #define PCIE_CORE_INT \
132 (PCIE_CORE_INT_PRFPE | PCIE_CORE_INT_CRFPE | \
133 PCIE_CORE_INT_RRPE | PCIE_CORE_INT_CRFO | \
134 PCIE_CORE_INT_RT | PCIE_CORE_INT_RTR | \
135 PCIE_CORE_INT_PE | PCIE_CORE_INT_MTR | \
136 PCIE_CORE_INT_UCR | PCIE_CORE_INT_FCE | \
137 PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
140 #define PCIE_RC_CONFIG_BASE 0xa00000
141 #define PCIE_RC_CONFIG_VENDOR (PCIE_RC_CONFIG_BASE + 0x00)
142 #define PCIE_RC_CONFIG_RID_CCR (PCIE_RC_CONFIG_BASE + 0x08)
143 #define PCIE_RC_CONFIG_SCC_SHIFT 16
144 #define PCIE_RC_CONFIG_DCR (PCIE_RC_CONFIG_BASE + 0xc4)
145 #define PCIE_RC_CONFIG_DCR_CSPL_SHIFT 18
146 #define PCIE_RC_CONFIG_DCR_CSPL_LIMIT 0xff
147 #define PCIE_RC_CONFIG_DCR_CPLS_SHIFT 26
148 #define PCIE_RC_CONFIG_LCS (PCIE_RC_CONFIG_BASE + 0xd0)
149 #define PCIE_RC_CONFIG_L1_SUBSTATE_CTRL2 (PCIE_RC_CONFIG_BASE + 0x90c)
150 #define PCIE_RC_CONFIG_THP_CAP (PCIE_RC_CONFIG_BASE + 0x274)
151 #define PCIE_RC_CONFIG_THP_CAP_NEXT_MASK GENMASK(31, 20)
153 #define PCIE_CORE_AXI_CONF_BASE 0xc00000
154 #define PCIE_CORE_OB_REGION_ADDR0 (PCIE_CORE_AXI_CONF_BASE + 0x0)
155 #define PCIE_CORE_OB_REGION_ADDR0_NUM_BITS 0x3f
156 #define PCIE_CORE_OB_REGION_ADDR0_LO_ADDR 0xffffff00
157 #define PCIE_CORE_OB_REGION_ADDR1 (PCIE_CORE_AXI_CONF_BASE + 0x4)
158 #define PCIE_CORE_OB_REGION_DESC0 (PCIE_CORE_AXI_CONF_BASE + 0x8)
159 #define PCIE_CORE_OB_REGION_DESC1 (PCIE_CORE_AXI_CONF_BASE + 0xc)
161 #define PCIE_CORE_AXI_INBOUND_BASE 0xc00800
162 #define PCIE_RP_IB_ADDR0 (PCIE_CORE_AXI_INBOUND_BASE + 0x0)
163 #define PCIE_CORE_IB_REGION_ADDR0_NUM_BITS 0x3f
164 #define PCIE_CORE_IB_REGION_ADDR0_LO_ADDR 0xffffff00
165 #define PCIE_RP_IB_ADDR1 (PCIE_CORE_AXI_INBOUND_BASE + 0x4)
167 /* Size of one AXI Region (not Region 0) */
168 #define AXI_REGION_SIZE BIT(20)
169 /* Size of Region 0, equal to sum of sizes of other regions */
170 #define AXI_REGION_0_SIZE (32 * (0x1 << 20))
171 #define OB_REG_SIZE_SHIFT 5
172 #define IB_ROOT_PORT_REG_SIZE_SHIFT 3
173 #define AXI_WRAPPER_IO_WRITE 0x6
174 #define AXI_WRAPPER_MEM_WRITE 0x2
175 #define AXI_WRAPPER_NOR_MSG 0xc
177 #define MAX_AXI_IB_ROOTPORT_REGION_NUM 3
178 #define MIN_AXI_ADDR_BITS_PASSED 8
179 #define PCIE_RC_SEND_PME_OFF 0x11960
180 #define ROCKCHIP_VENDOR_ID 0x1d87
181 #define PCIE_ECAM_BUS(x) (((x) & 0xff) << 20)
182 #define PCIE_ECAM_DEV(x) (((x) & 0x1f) << 15)
183 #define PCIE_ECAM_FUNC(x) (((x) & 0x7) << 12)
184 #define PCIE_ECAM_REG(x) (((x) & 0xfff) << 0)
185 #define PCIE_ECAM_ADDR(bus, dev, func, reg) \
186 (PCIE_ECAM_BUS(bus) | PCIE_ECAM_DEV(dev) | \
187 PCIE_ECAM_FUNC(func) | PCIE_ECAM_REG(reg))
188 #define PCIE_LINK_IS_L2(x) \
189 (((x) & PCIE_CLIENT_DEBUG_LTSSM_MASK) == PCIE_CLIENT_DEBUG_LTSSM_L2)
191 #define RC_REGION_0_ADDR_TRANS_H 0x00000000
192 #define RC_REGION_0_ADDR_TRANS_L 0x00000000
193 #define RC_REGION_0_PASS_BITS (25 - 1)
194 #define MAX_AXI_WRAPPER_REGION_NUM 33
196 struct rockchip_pcie {
197 void __iomem *reg_base; /* DT axi-base */
198 void __iomem *apb_base; /* DT apb-base */
200 struct reset_control *core_rst;
201 struct reset_control *mgmt_rst;
202 struct reset_control *mgmt_sticky_rst;
203 struct reset_control *pipe_rst;
204 struct reset_control *pm_rst;
205 struct reset_control *aclk_rst;
206 struct reset_control *pclk_rst;
207 struct clk *aclk_pcie;
208 struct clk *aclk_perf_pcie;
209 struct clk *hclk_pcie;
210 struct clk *clk_pcie_pm;
211 struct regulator *vpcie3v3; /* 3.3V power supply */
212 struct regulator *vpcie1v8; /* 1.8V power supply */
213 struct regulator *vpcie0v9; /* 0.9V power supply */
214 struct gpio_desc *ep_gpio;
219 struct irq_domain *irq_domain;
222 phys_addr_t io_bus_addr;
223 void __iomem *msg_region;
225 phys_addr_t msg_bus_addr;
226 phys_addr_t mem_bus_addr;
229 static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
231 return readl(rockchip->apb_base + reg);
234 static void rockchip_pcie_write(struct rockchip_pcie *rockchip, u32 val,
237 writel(val, rockchip->apb_base + reg);
240 static void rockchip_pcie_enable_bw_int(struct rockchip_pcie *rockchip)
244 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
245 status |= (PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
246 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
249 static void rockchip_pcie_clr_bw_int(struct rockchip_pcie *rockchip)
253 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
254 status |= (PCI_EXP_LNKSTA_LBMS | PCI_EXP_LNKSTA_LABS) << 16;
255 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
258 static void rockchip_pcie_update_txcredit_mui(struct rockchip_pcie *rockchip)
262 /* Update Tx credit maximum update interval */
263 val = rockchip_pcie_read(rockchip, PCIE_CORE_TXCREDIT_CFG1);
264 val &= ~PCIE_CORE_TXCREDIT_CFG1_MUI_MASK;
265 val |= PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(24000); /* ns */
266 rockchip_pcie_write(rockchip, val, PCIE_CORE_TXCREDIT_CFG1);
269 static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
270 struct pci_bus *bus, int dev)
272 /* access only one slot on each root port */
273 if (bus->number == rockchip->root_bus_nr && dev > 0)
277 * do not read more than one device on the bus directly attached
278 * to RC's downstream side.
280 if (bus->primary == rockchip->root_bus_nr && dev > 0)
286 static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
287 int where, int size, u32 *val)
289 void __iomem *addr = rockchip->apb_base + PCIE_RC_CONFIG_BASE + where;
291 if (!IS_ALIGNED((uintptr_t)addr, size)) {
293 return PCIBIOS_BAD_REGISTER_NUMBER;
298 } else if (size == 2) {
300 } else if (size == 1) {
304 return PCIBIOS_BAD_REGISTER_NUMBER;
306 return PCIBIOS_SUCCESSFUL;
309 static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
310 int where, int size, u32 val)
312 u32 mask, tmp, offset;
314 offset = where & ~0x3;
317 writel(val, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
318 return PCIBIOS_SUCCESSFUL;
321 mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
324 * N.B. This read/modify/write isn't safe in general because it can
325 * corrupt RW1C bits in adjacent registers. But the hardware
326 * doesn't support smaller writes.
328 tmp = readl(rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset) & mask;
329 tmp |= val << ((where & 0x3) * 8);
330 writel(tmp, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
332 return PCIBIOS_SUCCESSFUL;
335 static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
336 struct pci_bus *bus, u32 devfn,
337 int where, int size, u32 *val)
341 busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
342 PCI_FUNC(devfn), where);
344 if (!IS_ALIGNED(busdev, size)) {
346 return PCIBIOS_BAD_REGISTER_NUMBER;
350 *val = readl(rockchip->reg_base + busdev);
351 } else if (size == 2) {
352 *val = readw(rockchip->reg_base + busdev);
353 } else if (size == 1) {
354 *val = readb(rockchip->reg_base + busdev);
357 return PCIBIOS_BAD_REGISTER_NUMBER;
359 return PCIBIOS_SUCCESSFUL;
362 static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
363 struct pci_bus *bus, u32 devfn,
364 int where, int size, u32 val)
368 busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
369 PCI_FUNC(devfn), where);
370 if (!IS_ALIGNED(busdev, size))
371 return PCIBIOS_BAD_REGISTER_NUMBER;
374 writel(val, rockchip->reg_base + busdev);
376 writew(val, rockchip->reg_base + busdev);
378 writeb(val, rockchip->reg_base + busdev);
380 return PCIBIOS_BAD_REGISTER_NUMBER;
382 return PCIBIOS_SUCCESSFUL;
385 static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
388 struct rockchip_pcie *rockchip = bus->sysdata;
390 if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
392 return PCIBIOS_DEVICE_NOT_FOUND;
395 if (bus->number == rockchip->root_bus_nr)
396 return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
398 return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size, val);
401 static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
402 int where, int size, u32 val)
404 struct rockchip_pcie *rockchip = bus->sysdata;
406 if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
407 return PCIBIOS_DEVICE_NOT_FOUND;
409 if (bus->number == rockchip->root_bus_nr)
410 return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
412 return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size, val);
415 static struct pci_ops rockchip_pcie_ops = {
416 .read = rockchip_pcie_rd_conf,
417 .write = rockchip_pcie_wr_conf,
420 static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
422 u32 status, curr, scale, power;
424 if (IS_ERR(rockchip->vpcie3v3))
428 * Set RC's captured slot power limit and scale if
429 * vpcie3v3 available. The default values are both zero
430 * which means the software should set these two according
431 * to the actual power supply.
433 curr = regulator_get_current_limit(rockchip->vpcie3v3);
435 scale = 3; /* 0.001x */
436 curr = curr / 1000; /* convert to mA */
437 power = (curr * 3300) / 1000; /* milliwatt */
438 while (power > PCIE_RC_CONFIG_DCR_CSPL_LIMIT) {
440 dev_warn(rockchip->dev, "invalid power supply\n");
447 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCR);
448 status |= (power << PCIE_RC_CONFIG_DCR_CSPL_SHIFT) |
449 (scale << PCIE_RC_CONFIG_DCR_CPLS_SHIFT);
450 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCR);
455 * rockchip_pcie_init_port - Initialize hardware
456 * @rockchip: PCIe port information
458 static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
460 struct device *dev = rockchip->dev;
463 unsigned long timeout;
465 gpiod_set_value(rockchip->ep_gpio, 0);
467 err = reset_control_assert(rockchip->aclk_rst);
469 dev_err(dev, "assert aclk_rst err %d\n", err);
473 err = reset_control_assert(rockchip->pclk_rst);
475 dev_err(dev, "assert pclk_rst err %d\n", err);
479 err = reset_control_assert(rockchip->pm_rst);
481 dev_err(dev, "assert pm_rst err %d\n", err);
485 err = phy_init(rockchip->phy);
487 dev_err(dev, "fail to init phy, err %d\n", err);
491 err = reset_control_assert(rockchip->core_rst);
493 dev_err(dev, "assert core_rst err %d\n", err);
497 err = reset_control_assert(rockchip->mgmt_rst);
499 dev_err(dev, "assert mgmt_rst err %d\n", err);
503 err = reset_control_assert(rockchip->mgmt_sticky_rst);
505 dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
509 err = reset_control_assert(rockchip->pipe_rst);
511 dev_err(dev, "assert pipe_rst err %d\n", err);
517 err = reset_control_deassert(rockchip->pm_rst);
519 dev_err(dev, "deassert pm_rst err %d\n", err);
523 err = reset_control_deassert(rockchip->aclk_rst);
525 dev_err(dev, "deassert aclk_rst err %d\n", err);
529 err = reset_control_deassert(rockchip->pclk_rst);
531 dev_err(dev, "deassert pclk_rst err %d\n", err);
535 if (rockchip->link_gen == 2)
536 rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_2,
539 rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_1,
542 rockchip_pcie_write(rockchip,
543 PCIE_CLIENT_CONF_ENABLE |
544 PCIE_CLIENT_LINK_TRAIN_ENABLE |
545 PCIE_CLIENT_ARI_ENABLE |
546 PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes) |
550 err = phy_power_on(rockchip->phy);
552 dev_err(dev, "fail to power on phy, err %d\n", err);
557 * Please don't reorder the deassert sequence of the following
560 err = reset_control_deassert(rockchip->mgmt_sticky_rst);
562 dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
566 err = reset_control_deassert(rockchip->core_rst);
568 dev_err(dev, "deassert core_rst err %d\n", err);
572 err = reset_control_deassert(rockchip->mgmt_rst);
574 dev_err(dev, "deassert mgmt_rst err %d\n", err);
578 err = reset_control_deassert(rockchip->pipe_rst);
580 dev_err(dev, "deassert pipe_rst err %d\n", err);
584 /* Fix the transmitted FTS count desired to exit from L0s. */
585 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL_PLC1);
586 status = (status & ~PCIE_CORE_CTRL_PLC1_FTS_MASK) |
587 (PCIE_CORE_CTRL_PLC1_FTS_CNT << PCIE_CORE_CTRL_PLC1_FTS_SHIFT);
588 rockchip_pcie_write(rockchip, status, PCIE_CORE_CTRL_PLC1);
590 rockchip_pcie_set_power_limit(rockchip);
592 /* Set RC's clock architecture as common clock */
593 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
594 status |= PCI_EXP_LNKCTL_CCC;
595 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
597 /* Enable Gen1 training */
598 rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
601 gpiod_set_value(rockchip->ep_gpio, 1);
603 /* 500ms timeout value should be enough for Gen1/2 training */
604 timeout = jiffies + msecs_to_jiffies(500);
607 status = rockchip_pcie_read(rockchip,
608 PCIE_CLIENT_BASIC_STATUS1);
609 if ((status & PCIE_CLIENT_LINK_STATUS_MASK) ==
610 PCIE_CLIENT_LINK_STATUS_UP) {
611 dev_dbg(dev, "PCIe link training gen1 pass!\n");
615 if (time_after(jiffies, timeout)) {
616 dev_err(dev, "PCIe link training gen1 timeout!\n");
623 if (rockchip->link_gen == 2) {
625 * Enable retrain for gen2. This should be configured only after
628 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
629 status |= PCI_EXP_LNKCTL_RL;
630 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
632 timeout = jiffies + msecs_to_jiffies(500);
634 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
635 if ((status & PCIE_CORE_PL_CONF_SPEED_MASK) ==
636 PCIE_CORE_PL_CONF_SPEED_5G) {
637 dev_dbg(dev, "PCIe link training gen2 pass!\n");
641 if (time_after(jiffies, timeout)) {
642 dev_dbg(dev, "PCIe link training gen2 timeout, fall back to gen1!\n");
650 /* Check the final link width from negotiated lane counter from MGMT */
651 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
652 status = 0x1 << ((status & PCIE_CORE_PL_CONF_LANE_MASK) >>
653 PCIE_CORE_PL_CONF_LANE_SHIFT);
654 dev_dbg(dev, "current link width is x%d\n", status);
656 rockchip_pcie_write(rockchip, ROCKCHIP_VENDOR_ID,
657 PCIE_RC_CONFIG_VENDOR);
658 rockchip_pcie_write(rockchip,
659 PCI_CLASS_BRIDGE_PCI << PCIE_RC_CONFIG_SCC_SHIFT,
660 PCIE_RC_CONFIG_RID_CCR);
662 /* Clear THP cap's next cap pointer to remove L1 substate cap */
663 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_THP_CAP);
664 status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK;
665 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_THP_CAP);
667 rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
669 rockchip_pcie_write(rockchip,
670 (RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
671 PCIE_CORE_OB_REGION_ADDR0);
672 rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
673 PCIE_CORE_OB_REGION_ADDR1);
674 rockchip_pcie_write(rockchip, 0x0080000a, PCIE_CORE_OB_REGION_DESC0);
675 rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
680 static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
682 struct rockchip_pcie *rockchip = arg;
683 struct device *dev = rockchip->dev;
687 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
688 if (reg & PCIE_CLIENT_INT_LOCAL) {
689 dev_dbg(dev, "local interrupt received\n");
690 sub_reg = rockchip_pcie_read(rockchip, PCIE_CORE_INT_STATUS);
691 if (sub_reg & PCIE_CORE_INT_PRFPE)
692 dev_dbg(dev, "parity error detected while reading from the PNP receive FIFO RAM\n");
694 if (sub_reg & PCIE_CORE_INT_CRFPE)
695 dev_dbg(dev, "parity error detected while reading from the Completion Receive FIFO RAM\n");
697 if (sub_reg & PCIE_CORE_INT_RRPE)
698 dev_dbg(dev, "parity error detected while reading from replay buffer RAM\n");
700 if (sub_reg & PCIE_CORE_INT_PRFO)
701 dev_dbg(dev, "overflow occurred in the PNP receive FIFO\n");
703 if (sub_reg & PCIE_CORE_INT_CRFO)
704 dev_dbg(dev, "overflow occurred in the completion receive FIFO\n");
706 if (sub_reg & PCIE_CORE_INT_RT)
707 dev_dbg(dev, "replay timer timed out\n");
709 if (sub_reg & PCIE_CORE_INT_RTR)
710 dev_dbg(dev, "replay timer rolled over after 4 transmissions of the same TLP\n");
712 if (sub_reg & PCIE_CORE_INT_PE)
713 dev_dbg(dev, "phy error detected on receive side\n");
715 if (sub_reg & PCIE_CORE_INT_MTR)
716 dev_dbg(dev, "malformed TLP received from the link\n");
718 if (sub_reg & PCIE_CORE_INT_UCR)
719 dev_dbg(dev, "malformed TLP received from the link\n");
721 if (sub_reg & PCIE_CORE_INT_FCE)
722 dev_dbg(dev, "an error was observed in the flow control advertisements from the other side\n");
724 if (sub_reg & PCIE_CORE_INT_CT)
725 dev_dbg(dev, "a request timed out waiting for completion\n");
727 if (sub_reg & PCIE_CORE_INT_UTC)
728 dev_dbg(dev, "unmapped TC error\n");
730 if (sub_reg & PCIE_CORE_INT_MMVC)
731 dev_dbg(dev, "MSI mask register changes\n");
733 rockchip_pcie_write(rockchip, sub_reg, PCIE_CORE_INT_STATUS);
734 } else if (reg & PCIE_CLIENT_INT_PHY) {
735 dev_dbg(dev, "phy link changes\n");
736 rockchip_pcie_update_txcredit_mui(rockchip);
737 rockchip_pcie_clr_bw_int(rockchip);
740 rockchip_pcie_write(rockchip, reg & PCIE_CLIENT_INT_LOCAL,
741 PCIE_CLIENT_INT_STATUS);
746 static irqreturn_t rockchip_pcie_client_irq_handler(int irq, void *arg)
748 struct rockchip_pcie *rockchip = arg;
749 struct device *dev = rockchip->dev;
752 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
753 if (reg & PCIE_CLIENT_INT_LEGACY_DONE)
754 dev_dbg(dev, "legacy done interrupt received\n");
756 if (reg & PCIE_CLIENT_INT_MSG)
757 dev_dbg(dev, "message done interrupt received\n");
759 if (reg & PCIE_CLIENT_INT_HOT_RST)
760 dev_dbg(dev, "hot reset interrupt received\n");
762 if (reg & PCIE_CLIENT_INT_DPA)
763 dev_dbg(dev, "dpa interrupt received\n");
765 if (reg & PCIE_CLIENT_INT_FATAL_ERR)
766 dev_dbg(dev, "fatal error interrupt received\n");
768 if (reg & PCIE_CLIENT_INT_NFATAL_ERR)
769 dev_dbg(dev, "no fatal error interrupt received\n");
771 if (reg & PCIE_CLIENT_INT_CORR_ERR)
772 dev_dbg(dev, "correctable error interrupt received\n");
774 if (reg & PCIE_CLIENT_INT_PHY)
775 dev_dbg(dev, "phy interrupt received\n");
777 rockchip_pcie_write(rockchip, reg & (PCIE_CLIENT_INT_LEGACY_DONE |
778 PCIE_CLIENT_INT_MSG | PCIE_CLIENT_INT_HOT_RST |
779 PCIE_CLIENT_INT_DPA | PCIE_CLIENT_INT_FATAL_ERR |
780 PCIE_CLIENT_INT_NFATAL_ERR |
781 PCIE_CLIENT_INT_CORR_ERR |
782 PCIE_CLIENT_INT_PHY),
783 PCIE_CLIENT_INT_STATUS);
788 static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
790 struct irq_chip *chip = irq_desc_get_chip(desc);
791 struct rockchip_pcie *rockchip = irq_desc_get_handler_data(desc);
792 struct device *dev = rockchip->dev;
797 chained_irq_enter(chip, desc);
799 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
800 reg = (reg & PCIE_CLIENT_INTR_MASK) >> PCIE_CLIENT_INTR_SHIFT;
803 hwirq = ffs(reg) - 1;
806 virq = irq_find_mapping(rockchip->irq_domain, hwirq);
808 generic_handle_irq(virq);
810 dev_err(dev, "unexpected IRQ, INT%d\n", hwirq);
813 chained_irq_exit(chip, desc);
818 * rockchip_pcie_parse_dt - Parse Device Tree
819 * @rockchip: PCIe port information
821 * Return: '0' on success and error value on failure
823 static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
825 struct device *dev = rockchip->dev;
826 struct platform_device *pdev = to_platform_device(dev);
827 struct device_node *node = dev->of_node;
828 struct resource *regs;
832 regs = platform_get_resource_byname(pdev,
835 rockchip->reg_base = devm_ioremap_resource(dev, regs);
836 if (IS_ERR(rockchip->reg_base))
837 return PTR_ERR(rockchip->reg_base);
839 regs = platform_get_resource_byname(pdev,
842 rockchip->apb_base = devm_ioremap_resource(dev, regs);
843 if (IS_ERR(rockchip->apb_base))
844 return PTR_ERR(rockchip->apb_base);
846 rockchip->phy = devm_phy_get(dev, "pcie-phy");
847 if (IS_ERR(rockchip->phy)) {
848 if (PTR_ERR(rockchip->phy) != -EPROBE_DEFER)
849 dev_err(dev, "missing phy\n");
850 return PTR_ERR(rockchip->phy);
854 err = of_property_read_u32(node, "num-lanes", &rockchip->lanes);
855 if (!err && (rockchip->lanes == 0 ||
856 rockchip->lanes == 3 ||
857 rockchip->lanes > 4)) {
858 dev_warn(dev, "invalid num-lanes, default to use one lane\n");
862 rockchip->link_gen = of_pci_get_max_link_speed(node);
863 if (rockchip->link_gen < 0 || rockchip->link_gen > 2)
864 rockchip->link_gen = 2;
866 rockchip->core_rst = devm_reset_control_get(dev, "core");
867 if (IS_ERR(rockchip->core_rst)) {
868 if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER)
869 dev_err(dev, "missing core reset property in node\n");
870 return PTR_ERR(rockchip->core_rst);
873 rockchip->mgmt_rst = devm_reset_control_get(dev, "mgmt");
874 if (IS_ERR(rockchip->mgmt_rst)) {
875 if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER)
876 dev_err(dev, "missing mgmt reset property in node\n");
877 return PTR_ERR(rockchip->mgmt_rst);
880 rockchip->mgmt_sticky_rst = devm_reset_control_get(dev, "mgmt-sticky");
881 if (IS_ERR(rockchip->mgmt_sticky_rst)) {
882 if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER)
883 dev_err(dev, "missing mgmt-sticky reset property in node\n");
884 return PTR_ERR(rockchip->mgmt_sticky_rst);
887 rockchip->pipe_rst = devm_reset_control_get(dev, "pipe");
888 if (IS_ERR(rockchip->pipe_rst)) {
889 if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER)
890 dev_err(dev, "missing pipe reset property in node\n");
891 return PTR_ERR(rockchip->pipe_rst);
894 rockchip->pm_rst = devm_reset_control_get(dev, "pm");
895 if (IS_ERR(rockchip->pm_rst)) {
896 if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
897 dev_err(dev, "missing pm reset property in node\n");
898 return PTR_ERR(rockchip->pm_rst);
901 rockchip->pclk_rst = devm_reset_control_get(dev, "pclk");
902 if (IS_ERR(rockchip->pclk_rst)) {
903 if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
904 dev_err(dev, "missing pclk reset property in node\n");
905 return PTR_ERR(rockchip->pclk_rst);
908 rockchip->aclk_rst = devm_reset_control_get(dev, "aclk");
909 if (IS_ERR(rockchip->aclk_rst)) {
910 if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
911 dev_err(dev, "missing aclk reset property in node\n");
912 return PTR_ERR(rockchip->aclk_rst);
915 rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
916 if (IS_ERR(rockchip->ep_gpio)) {
917 dev_err(dev, "missing ep-gpios property in node\n");
918 return PTR_ERR(rockchip->ep_gpio);
921 rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
922 if (IS_ERR(rockchip->aclk_pcie)) {
923 dev_err(dev, "aclk clock not found\n");
924 return PTR_ERR(rockchip->aclk_pcie);
927 rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
928 if (IS_ERR(rockchip->aclk_perf_pcie)) {
929 dev_err(dev, "aclk_perf clock not found\n");
930 return PTR_ERR(rockchip->aclk_perf_pcie);
933 rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
934 if (IS_ERR(rockchip->hclk_pcie)) {
935 dev_err(dev, "hclk clock not found\n");
936 return PTR_ERR(rockchip->hclk_pcie);
939 rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
940 if (IS_ERR(rockchip->clk_pcie_pm)) {
941 dev_err(dev, "pm clock not found\n");
942 return PTR_ERR(rockchip->clk_pcie_pm);
945 irq = platform_get_irq_byname(pdev, "sys");
947 dev_err(dev, "missing sys IRQ resource\n");
951 err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
952 IRQF_SHARED, "pcie-sys", rockchip);
954 dev_err(dev, "failed to request PCIe subsystem IRQ\n");
958 irq = platform_get_irq_byname(pdev, "legacy");
960 dev_err(dev, "missing legacy IRQ resource\n");
964 irq_set_chained_handler_and_data(irq,
965 rockchip_pcie_legacy_int_handler,
968 irq = platform_get_irq_byname(pdev, "client");
970 dev_err(dev, "missing client IRQ resource\n");
974 err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
975 IRQF_SHARED, "pcie-client", rockchip);
977 dev_err(dev, "failed to request PCIe client IRQ\n");
981 rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
982 if (IS_ERR(rockchip->vpcie3v3)) {
983 if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER)
984 return -EPROBE_DEFER;
985 dev_info(dev, "no vpcie3v3 regulator found\n");
988 rockchip->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8");
989 if (IS_ERR(rockchip->vpcie1v8)) {
990 if (PTR_ERR(rockchip->vpcie1v8) == -EPROBE_DEFER)
991 return -EPROBE_DEFER;
992 dev_info(dev, "no vpcie1v8 regulator found\n");
995 rockchip->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9");
996 if (IS_ERR(rockchip->vpcie0v9)) {
997 if (PTR_ERR(rockchip->vpcie0v9) == -EPROBE_DEFER)
998 return -EPROBE_DEFER;
999 dev_info(dev, "no vpcie0v9 regulator found\n");
1005 static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)
1007 struct device *dev = rockchip->dev;
1010 if (!IS_ERR(rockchip->vpcie3v3)) {
1011 err = regulator_enable(rockchip->vpcie3v3);
1013 dev_err(dev, "fail to enable vpcie3v3 regulator\n");
1018 if (!IS_ERR(rockchip->vpcie1v8)) {
1019 err = regulator_enable(rockchip->vpcie1v8);
1021 dev_err(dev, "fail to enable vpcie1v8 regulator\n");
1022 goto err_disable_3v3;
1026 if (!IS_ERR(rockchip->vpcie0v9)) {
1027 err = regulator_enable(rockchip->vpcie0v9);
1029 dev_err(dev, "fail to enable vpcie0v9 regulator\n");
1030 goto err_disable_1v8;
1037 if (!IS_ERR(rockchip->vpcie1v8))
1038 regulator_disable(rockchip->vpcie1v8);
1040 if (!IS_ERR(rockchip->vpcie3v3))
1041 regulator_disable(rockchip->vpcie3v3);
1046 static void rockchip_pcie_enable_interrupts(struct rockchip_pcie *rockchip)
1048 rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) &
1049 (~PCIE_CLIENT_INT_CLI), PCIE_CLIENT_INT_MASK);
1050 rockchip_pcie_write(rockchip, (u32)(~PCIE_CORE_INT),
1051 PCIE_CORE_INT_MASK);
1053 rockchip_pcie_enable_bw_int(rockchip);
1056 static int rockchip_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
1057 irq_hw_number_t hwirq)
1059 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
1060 irq_set_chip_data(irq, domain->host_data);
1065 static const struct irq_domain_ops intx_domain_ops = {
1066 .map = rockchip_pcie_intx_map,
1069 static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
1071 struct device *dev = rockchip->dev;
1072 struct device_node *intc = of_get_next_child(dev->of_node, NULL);
1075 dev_err(dev, "missing child interrupt-controller node\n");
1079 rockchip->irq_domain = irq_domain_add_linear(intc, 4,
1080 &intx_domain_ops, rockchip);
1081 if (!rockchip->irq_domain) {
1082 dev_err(dev, "failed to get a INTx IRQ domain\n");
1089 static int rockchip_pcie_prog_ob_atu(struct rockchip_pcie *rockchip,
1090 int region_no, int type, u8 num_pass_bits,
1091 u32 lower_addr, u32 upper_addr)
1098 if (region_no >= MAX_AXI_WRAPPER_REGION_NUM)
1100 if (num_pass_bits + 1 < 8)
1102 if (num_pass_bits > 63)
1104 if (region_no == 0) {
1105 if (AXI_REGION_0_SIZE < (2ULL << num_pass_bits))
1108 if (region_no != 0) {
1109 if (AXI_REGION_SIZE < (2ULL << num_pass_bits))
1113 aw_offset = (region_no << OB_REG_SIZE_SHIFT);
1115 ob_addr_0 = num_pass_bits & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS;
1116 ob_addr_0 |= lower_addr & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR;
1117 ob_addr_1 = upper_addr;
1118 ob_desc_0 = (1 << 23 | type);
1120 rockchip_pcie_write(rockchip, ob_addr_0,
1121 PCIE_CORE_OB_REGION_ADDR0 + aw_offset);
1122 rockchip_pcie_write(rockchip, ob_addr_1,
1123 PCIE_CORE_OB_REGION_ADDR1 + aw_offset);
1124 rockchip_pcie_write(rockchip, ob_desc_0,
1125 PCIE_CORE_OB_REGION_DESC0 + aw_offset);
1126 rockchip_pcie_write(rockchip, 0,
1127 PCIE_CORE_OB_REGION_DESC1 + aw_offset);
1132 static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
1133 int region_no, u8 num_pass_bits,
1134 u32 lower_addr, u32 upper_addr)
1140 if (region_no > MAX_AXI_IB_ROOTPORT_REGION_NUM)
1142 if (num_pass_bits + 1 < MIN_AXI_ADDR_BITS_PASSED)
1144 if (num_pass_bits > 63)
1147 aw_offset = (region_no << IB_ROOT_PORT_REG_SIZE_SHIFT);
1149 ib_addr_0 = num_pass_bits & PCIE_CORE_IB_REGION_ADDR0_NUM_BITS;
1150 ib_addr_0 |= (lower_addr << 8) & PCIE_CORE_IB_REGION_ADDR0_LO_ADDR;
1151 ib_addr_1 = upper_addr;
1153 rockchip_pcie_write(rockchip, ib_addr_0, PCIE_RP_IB_ADDR0 + aw_offset);
1154 rockchip_pcie_write(rockchip, ib_addr_1, PCIE_RP_IB_ADDR1 + aw_offset);
1159 static int rockchip_cfg_atu(struct rockchip_pcie *rockchip)
1165 for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
1166 err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
1167 AXI_WRAPPER_MEM_WRITE,
1169 rockchip->mem_bus_addr +
1173 dev_err(rockchip->dev,
1174 "program RC mem outbound ATU failed\n");
1179 err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
1181 dev_err(rockchip->dev, "program RC mem inbound ATU failed\n");
1185 offset = rockchip->mem_size >> 20;
1186 for (reg_no = 0; reg_no < (rockchip->io_size >> 20); reg_no++) {
1187 err = rockchip_pcie_prog_ob_atu(rockchip,
1188 reg_no + 1 + offset,
1189 AXI_WRAPPER_IO_WRITE,
1191 rockchip->io_bus_addr +
1195 dev_err(rockchip->dev,
1196 "program RC io outbound ATU failed\n");
1201 /* assign message regions */
1202 rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1 + offset,
1203 AXI_WRAPPER_NOR_MSG,
1206 rockchip->msg_bus_addr = rockchip->mem_bus_addr +
1207 ((reg_no + offset) << 20);
1211 static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip)
1216 /* send PME_TURN_OFF message */
1217 writel(0x0, rockchip->msg_region + PCIE_RC_SEND_PME_OFF);
1219 /* read LTSSM and wait for falling into L2 link state */
1220 err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_DEBUG_OUT_0,
1221 value, PCIE_LINK_IS_L2(value), 20,
1222 jiffies_to_usecs(5 * HZ));
1224 dev_err(rockchip->dev, "PCIe link enter L2 timeout!\n");
1231 static int rockchip_pcie_suspend_noirq(struct device *dev)
1233 struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
1236 /* disable core and cli int since we don't need to ack PME_ACK */
1237 rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) |
1238 PCIE_CLIENT_INT_CLI, PCIE_CLIENT_INT_MASK);
1239 rockchip_pcie_write(rockchip, (u32)PCIE_CORE_INT, PCIE_CORE_INT_MASK);
1241 ret = rockchip_pcie_wait_l2(rockchip);
1243 rockchip_pcie_enable_interrupts(rockchip);
1247 phy_power_off(rockchip->phy);
1248 phy_exit(rockchip->phy);
1250 clk_disable_unprepare(rockchip->clk_pcie_pm);
1251 clk_disable_unprepare(rockchip->hclk_pcie);
1252 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1253 clk_disable_unprepare(rockchip->aclk_pcie);
1258 static int rockchip_pcie_resume_noirq(struct device *dev)
1260 struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
1263 clk_prepare_enable(rockchip->clk_pcie_pm);
1264 clk_prepare_enable(rockchip->hclk_pcie);
1265 clk_prepare_enable(rockchip->aclk_perf_pcie);
1266 clk_prepare_enable(rockchip->aclk_pcie);
1268 err = rockchip_pcie_init_port(rockchip);
1272 err = rockchip_cfg_atu(rockchip);
1276 /* Need this to enter L1 again */
1277 rockchip_pcie_update_txcredit_mui(rockchip);
1278 rockchip_pcie_enable_interrupts(rockchip);
1283 static int rockchip_pcie_probe(struct platform_device *pdev)
1285 struct rockchip_pcie *rockchip;
1286 struct device *dev = &pdev->dev;
1287 struct pci_bus *bus, *child;
1288 struct resource_entry *win;
1289 resource_size_t io_base;
1290 struct resource *mem;
1291 struct resource *io;
1299 rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL);
1303 platform_set_drvdata(pdev, rockchip);
1304 rockchip->dev = dev;
1306 err = rockchip_pcie_parse_dt(rockchip);
1310 err = clk_prepare_enable(rockchip->aclk_pcie);
1312 dev_err(dev, "unable to enable aclk_pcie clock\n");
1316 err = clk_prepare_enable(rockchip->aclk_perf_pcie);
1318 dev_err(dev, "unable to enable aclk_perf_pcie clock\n");
1319 goto err_aclk_perf_pcie;
1322 err = clk_prepare_enable(rockchip->hclk_pcie);
1324 dev_err(dev, "unable to enable hclk_pcie clock\n");
1328 err = clk_prepare_enable(rockchip->clk_pcie_pm);
1330 dev_err(dev, "unable to enable hclk_pcie clock\n");
1334 err = rockchip_pcie_set_vpcie(rockchip);
1336 dev_err(dev, "failed to set vpcie regulator\n");
1340 err = rockchip_pcie_init_port(rockchip);
1344 platform_set_drvdata(pdev, rockchip);
1346 rockchip_pcie_enable_interrupts(rockchip);
1348 err = rockchip_pcie_init_irq_domain(rockchip);
1352 err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
1357 err = devm_request_pci_bus_resources(dev, &res);
1361 /* Get the I/O and memory ranges from DT */
1362 resource_list_for_each_entry(win, &res) {
1363 switch (resource_type(win->res)) {
1367 rockchip->io_size = resource_size(io);
1368 rockchip->io_bus_addr = io->start - win->offset;
1369 err = pci_remap_iospace(io, io_base);
1371 dev_warn(dev, "error %d: failed to map resource %pR\n",
1376 case IORESOURCE_MEM:
1379 rockchip->mem_size = resource_size(mem);
1380 rockchip->mem_bus_addr = mem->start - win->offset;
1382 case IORESOURCE_BUS:
1383 rockchip->root_bus_nr = win->res->start;
1390 err = rockchip_cfg_atu(rockchip);
1394 rockchip->msg_region = devm_ioremap(rockchip->dev,
1395 rockchip->msg_bus_addr, SZ_1M);
1396 if (!rockchip->msg_region) {
1401 bus = pci_scan_root_bus(&pdev->dev, 0, &rockchip_pcie_ops, rockchip, &res);
1407 pci_bus_size_bridges(bus);
1408 pci_bus_assign_resources(bus);
1409 list_for_each_entry(child, &bus->children, node)
1410 pcie_bus_configure_settings(child);
1412 pci_bus_add_devices(bus);
1414 dev_warn(dev, "only 32-bit config accesses supported; smaller writes may corrupt adjacent RW1C fields\n");
1419 if (!IS_ERR(rockchip->vpcie3v3))
1420 regulator_disable(rockchip->vpcie3v3);
1421 if (!IS_ERR(rockchip->vpcie1v8))
1422 regulator_disable(rockchip->vpcie1v8);
1423 if (!IS_ERR(rockchip->vpcie0v9))
1424 regulator_disable(rockchip->vpcie0v9);
1426 clk_disable_unprepare(rockchip->clk_pcie_pm);
1428 clk_disable_unprepare(rockchip->hclk_pcie);
1430 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1432 clk_disable_unprepare(rockchip->aclk_pcie);
1437 static const struct dev_pm_ops rockchip_pcie_pm_ops = {
1438 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq,
1439 rockchip_pcie_resume_noirq)
1442 static const struct of_device_id rockchip_pcie_of_match[] = {
1443 { .compatible = "rockchip,rk3399-pcie", },
1447 static struct platform_driver rockchip_pcie_driver = {
1449 .name = "rockchip-pcie",
1450 .of_match_table = rockchip_pcie_of_match,
1451 .pm = &rockchip_pcie_pm_ops,
1453 .probe = rockchip_pcie_probe,
1456 builtin_platform_driver(rockchip_pcie_driver);